Transmission band



July 10, 1923.

A. P. PF EFFER TRANSMIS S ION BAND Filed June 10. 1922 Patented July 10, 1923.

ANTHONY r. "rrnrrnn, 013 DETROIT, MICHIGAN.

TRANSMISSION BAND.

Application filed .Tune 10, 1922. Serial 1W0. 567,237.

To all whom it may concern Be it known that I ANTHONY P; Prnrrisn, a -.citizen of the United States, residing at Detroit, in the county of Wayneand, State of Michigan, have invented-certain new and useful Improvements 1' in Transmission Bandaofwlnch the following is a spec1fication, reference being had to the accompanysion spring and in drawings. 10. lh

transmission bands, and more particularly is invention relates to improvementsin to an improvement in thatform of transmission band. employed: for controlling the operation of planetary gearing ofthe type at present employed. in transmissions of the type shown-in the patent to H. Ford, No. 1,005,186, grantedOctober 10, 1911. j

I .An'important object of the invention is to provide means. whereby tensioning ears of thebands may be readily appliedto and removed therefrom.

1 Afu'rther object of the invention is to provide a band so constructed that all danger I of binding of the same upon the drum with which it coacts is eliminated. i

A still further OlDjQCtuOf the invention 18 110 provide a device of this character in which the necessity of employing spring metal in itsconstructioniis eliminated thereby. ellm nating .,the dangertof these bands breaking and {the parts thereof becoming jammed in the intermeshing gears to breakthe same.

An additional object of theinvention is to provide a deviceof this character which is simple in construction and operation, durable infservice, and a general improvement inthe art.v Y j V j .These-and other objects I attain by the construction'and arrangement shown inthe 40 accompanying drawings. wherein for the purposeof illustration is shown a-preferred embodiment of my. invention and wherein like reference characters designate like parts l throughout.

I In the drawings: p

Figure 1 is a side elevation partly in section of a transmission band constructed in accordance with ,my invention;

Figure 2 is a detailed view showing the manner of connecting the sections thereof;

Figure 3 is a view showing the spring mounting;

Figure 4: is a plan view of the compres- Figure 5 is a section on the line 55 of Figure 1.

1 Referring now more particularly to the a;

drawings: the band comprises end sections 10 of which two are provided and intermediate sections 11. The ends of the intermediate sections 11 and of the end sections 10 which join with the intermediate sections are .bent .back upon themselves to form shackle loops 12. Adjacent such end portions the metal of the body of the sections is struck out to form at the inner face of the band asocket 13 and at the outer face a shoulder 14. The end metal of the reverted portion is shaped about this struck out portion, as indicated at 15. p

The numeral 16. indicates a shackle link having its side portionsf engaged in the shackle loops 12'andbearing a coil spring 17, theends '18 of which are engaged with the adjacent inner faces of the band sectionsll or 10 and 11 as. the case may be,

tending to throw these sections into line with one another and straighten the bands. Employmenttofthis connection between the adj acent. ends-of the sections 11 and 'the'sections 10 and 11 eliminates the necessity of formingthe band of spring metal and permits. the use ofsome soft and tough sub stance suchas malleable iron or soft steel whichis much .more durable and less liable to shatter in use than the ordinary steel or cast iron band. In securing the lining 19 to the inner face of the band the rivets thereof are passed through openings formed in the shoulder. 14 and the overlying portion 'of the reverted end of the band so as to hold these sections firmly together and prevent movement thereof. l e

, The sections l0 have those endportions thereof to which .the adjusting ears 20 are secured providedwith off set portions 21, 22 and The offset portion 21, or that offset portion furthest fromthe free end of the section 10 is provided with an undercut face 2st at that side thereof remote from the free end of thesection 10 adapted to re- Iceivejanangular shoulder formed at the side face. of an opening 25 formed in the adjusting ear 20'for .the reception of the offset'portion The adjusting ear 20 is provided with a second opening 26 through which the offset 22 may extend to render the offset accessible so that rivets 27 may be disposed therethrough for securing into position, this end of the lining 19. The adjusting ears are provided adjacent that portion thereof bearing the ear proper 28 with an offset portion forming'a socket 29 receiving the offset23 of the section 10. Aligned openin s are formed in the adjusting ear and 0 set 23, as indicated by the numerals 30 and 31 in Figure 5each having a central enlargement 32 in which a shank- 33 of a securing member is rotatable. This securing member isprovided with a head 34 preferably having a screw driver slot so thatdt may 'bereadily rotated, andiupon the lower end of the stem thereof with flat oppositely extending arms 35 which are insertible' through the openings 30 and 31 whenproperly aligned therewith. By rotatingthe'securing member'these arms may be disposed at ri'ght a'ngles to the openings 30 and-31 to prevent separation of the ear and. the section 10 to which itis attached.

" the section 10 to which it is attached and then to'shift the same longitudinally to free the shoulder from the inclined face. It will accordingly be seen that by constr'ucting a transmission band inaccordance with .my invention the ears thereof may be readily attached and removed .and the band will automatically free itself'fromthe drum when the tension upontheears is released to permit movement thereof, each spring 17 operating independently to shift its sections. It will furthermorebe obvious that the construction as ,he'reinbefore set forth is capable of somev change and modification withoutmaterially departing'from the spirit of m'y invention and I accordingly do'not limit myself thereto except'as hereinafter claimed.

I, claim 1. A transmission band comprising a plurality of sections pivotally connected at their adjacent ends, and spring means disposed at each connection and tending to move said sections into line one with the other. f p,

2, A transmissionband' comprising end sections and intermediate sections, adjacent ends of the intermediate sections coacting with adjacent ends ofthe end sections having the endportions thereof bent to prothereof coacting with the adjacent ends of the end sections having the end portions thereofbent back to provide pivot receiving loops, said sections being provided adjacent such loops with offsets forming shoulders,

and sockets formed upon the end portions receiving said shoulders.

5. A transmission band com rising intermediate and end sections, ad acent ends of the intermediate sections and the ends thereof coacting with the adjacent ends of the end sections having the end portions thereof bent back to provide pivot receivin loops, said sections being provided with offset portions forming upon the inner face of the band a socket and upon the outer face of the band a shoulder, said end sections having sockets receiving said'shoulders and securing elements extending through the end sections and the offset portions of the corresponding sections for securing a lining to the inner face of the sections. I

6. A transmission band provided adjacent the ends thereof with shoulders havin the facesthereof remotefrom the ends 0% the band undercut and provided intermediate such shoulders and the ends of the band with offset portions forming upon the inner face of the band a socket and upon the outer face of the band a shoulder, adjusting ears having openings receiving the first named shoulders and provided with shoulders 00- acting with the undercut faces of the first named shoulders, a socket receiving the second named shoulder, and means extending through the adjusting ears and the offset portion forming the last named shoulder and engaging in the socket formed by such offset portions preventing vertical movement of the adjusting ears.

In testimony whereof I hereunto affix my signature.

ANTHONY P. PFEFFER. 

